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https://issues.apache.org/jira/browse/FLINK-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114946#comment-15114946
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ASF GitHub Bot commented on FLINK-3261:
---------------------------------------
Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/1537#discussion_r50670120
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/taskmanager/Task.java ---
@@ -854,7 +855,8 @@ private void notifyObservers(ExecutionState newState,
Throwable error) {
//
------------------------------------------------------------------------
/**
- * Calls the invokable to trigger a checkpoint, if the invokable
implements the interface
+ * Calls the invokable to trigger a checkpoint, i
+ * f the invokable implements the interface
--- End diff --
line break
> Tasks should eagerly report back when they cannot start a checkpoint
> --------------------------------------------------------------------
>
> Key: FLINK-3261
> URL: https://issues.apache.org/jira/browse/FLINK-3261
> Project: Flink
> Issue Type: Bug
> Components: Distributed Runtime
> Affects Versions: 0.10.1
> Reporter: Stephan Ewen
> Assignee: Aljoscha Krettek
> Priority: Blocker
> Fix For: 1.0.0
>
>
> With very fast checkpoint intervals (few 100 msecs), it can happen that a
> Task is not ready to start a checkpoint by the time it gets the first
> checkpoint trigger message.
> If some other tasks are ready already and commence a checkpoint, the stream
> alignment will make the non-participating task wait until the checkpoint
> expires (default: 10 minutes).
> A simple way to fix this is that tasks report back when they could not start
> a checkpoint. The checkpoint coordinator can then abort that checkpoint and
> unblock the streams by starting new checkpoint (where all tasks will
> participate).
> An optimization would be to send a special "abort checkpoints barrier" that
> tells the barrier buffers for stream alignment to unblock a checkpoint.
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